Diamond



FIG. 1 is a perspective view of a diamond showing my new design;

FIG. 2 is a front view; the rear view being a mirror image thereof;

FIG. 3 is a left side view; the right side view being a mirror image thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

CLAIM The ornamental design for a diamond, as shown and described. 